Category Archive: DR/COOP

Oct 23

On tape…

Ok, I have no problem with tape.  It’s a *GREAT* backup medium when your requirement is portability for massive amounts of data and you’re not replicating said data. If I had to ship 400TB of backups to Iron-Mountain, to protect against the earthquake-to-end-all-earthquakes tape would be my FIRST choice (though maybe, as a GIANT CAVE …

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Jul 09

Storage Tiering…

Ok, given the changes to the storage arena I’ve been working on a revised “Tiering system” to incorporate all of the levels of data…importance? My version of Storage Tiering is (or should be) as follows: Tier-1    – Symmetrix/Replicated – High Performance/Criticial Data Tier-2    – Symmetrix/NonReplicated – High Performance/Non-Criticial Data Tier-3   – Symmetrix/SATA/Replicated – High-Medium Performance/Critical …

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Jun 07

Priceless…..

Just Sayin……

Aug 22

Hours lost….

So we have 12 500G SATA disks in a DMX-4…..   Carved them into 147 29G Hypervolumes, the VTOC took over 7 hours. The fun part happened when the symconfigure script died.  Had to have the lab dial into the Symm and step the process through to the end. The cool part is that we were …

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Feb 06

The Fake Synchronous SAN

In response to this article on “EnterpriseStorageForum”:  Synchronous SAN Sets Fibre Channel Distance Record My Response: True Synchronous transmission works over any distance – if you can live with the latency.   The problem is that most hosts operating systems can’t.  So different buffering schemes are cooked up to fool the host into thinking the write is …

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Oct 25

RPO vs. RTO

I had an engineer friend of mine (real engineer, not affiliated with computers) once told me.  “There are three options:      1. You can have it faster.      2. You can have it smaller.      3. You can have it cheaper. ….Now pick any two.” Over and over in my life I’ve put that theory to …

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